station_station_typesのidをNULL許容に変更#1316
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TinyKitten merged 1 commit intodevfrom Aug 9, 2025
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Walkthrough新たに複数のPostgreSQL向けSQLクエリ定義ファイルが Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant DB
Client->>DB: パラメータ付きで駅・路線・種別詳細取得クエリを実行
DB->>DB: 複数テーブルJOIN・CTE・エイリアス解決・フィルタ適用
DB-->>Client: 詳細情報（多言語名・色・種別等）を返却
Estimated code review effort🎯 4 (Complex) | ⏱️ ~40分 Possibly related PRs
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Actionable comments posted: 9
🔭 Outside diff range comments (1)
data/create_table.sql (1)
192-198: station_station_types.idの自動採番＆主キー制約が未設定であるぞ朕が確認したところ、以下の問題がある。
- data/create_table.sql（行192–198）で、id列は
integer型でNULL許容／DEFAULT未定義。
→station_station_types_id_seqはOWNED BYされているが、DEFAULTが付いておらず、CSVからCOPYした際にNULLがそのまま格納される。- 同ファイルにおいて、station_station_typesテーブルへの主キー制約がまったく定義されておらぬ。
これでは重複行やNULL idが入り込む恐れがあり、.sqlxの多くのクエリで
ORDER BY sst.idやJOIN条件に依存している以上、挙動が不定となる。＜修正案＞好みと運用に応じ選べ：
- 方法1：DEFAULT + NOT NULL + PRIMARY KEYを追加
ALTER TABLE public.station_station_types ALTER COLUMN id SET NOT NULL, ALTER COLUMN id SET DEFAULT nextval('public.station_station_types_id_seq'); ALTER TABLE public.station_station_types ADD CONSTRAINT station_station_types_pkey PRIMARY KEY (id);- 方法2：IDENTITY列へ置き換え
ALTER TABLE public.station_station_types ALTER COLUMN id DROP DEFAULT, ALTER COLUMN id ADD GENERATED BY DEFAULT AS IDENTITY; ALTER TABLE public.station_station_types ADD CONSTRAINT station_station_types_pkey PRIMARY KEY (id);- 方法3：トリガーで補完（CSV中NULLも包含）＋PK
CREATE OR REPLACE FUNCTION public.fill_sst_id_when_null() RETURNS trigger LANGUAGE plpgsql AS $$ BEGIN IF NEW.id IS NULL THEN NEW.id := nextval('public.station_station_types_id_seq'); END IF; RETURN NEW; END; $$; CREATE TRIGGER station_station_types_id_default BEFORE INSERT ON public.station_station_types FOR EACH ROW EXECUTE FUNCTION public.fill_sst_id_when_null(); ALTER TABLE public.station_station_types ALTER COLUMN id SET NOT NULL, ADD CONSTRAINT station_station_types_pkey PRIMARY KEY (id);これらを適用して、確実に自動採番と一意性を保証せよ。
🧹 Nitpick comments (15)
.sqlx/query-7428cc69d3756a749121a1ad5eee1603aa5e7ee3fc30071a142f9a15502da031.json (1)
3-3: 生存確認はEXISTSで足る。より俊敏にせよCOUNT(col) <> 0 は全件を数え上げる。朕は EXISTS を薦む。最初の1行で止まるゆえ軽い。
- "query": "SELECT COUNT(stations.station_cd) <> 0 AS alive FROM stations", + "query": "SELECT EXISTS(SELECT 1 FROM stations) AS alive",.sqlx/query-5f3a17f24bd4844e46b57d4920a3261ff87dfa6557926fb1b680d96c42ed56d4.json (1)
3-3: 【性能の備え、怠るな】
JOIN/絞り込みの主柱に index を備えよ。sst.station_cd, sst.type_cd、t.type_cd, t.kind, t.priority に索引があれば、数の道は速やかになる。.sqlx/query-1ffa93b133de68b60a7e0a6663f212f613c175a35beb700a0001efb82f184d10.json (1)
3-3: 【検索の器用、民の声を聞け】
名称検索が大文字小文字を弁えずとも通るべきなら、LIKE を ILIKE に改めるがよい。必要なければ現状のまま進め。.sqlx/query-8fd35acd42a42b730854a2f1b9ffa0fd2f8384b457e7945d4070d976ecd9594f.json (1)
77-91: 【メタデータの整合、速やかに図れ】
nullable の配列では id 列（ordinal 8）が false（非NULL）となっておる。スキーマが NULL 許容なら、Option 相当に合わせ、メタを再生成せよ。余は必要なら手を貸そう。.sqlx/query-55bee6b45754d1da9bf555d319f015ce232f8574a41c3ef25b730d11071f8428.json (3)
3-3: JOIN条件、ON句へ集約せよ今は
JOIN ... ON sst.line_group_cd = $1 WHERE t.type_cd = sst.type_cdと分断されておる。可読性と保守性のため、結合条件はON句に寄せるがよい。計画自体は同等なれど、意図が明瞭となる。-FROM types as t -JOIN station_station_types AS sst ON sst.line_group_cd = $1 -WHERE - t.type_cd = sst.type_cd +FROM types AS t +JOIN station_station_types AS sst + ON sst.line_group_cd = $1 + AND t.type_cd = sst.type_cd
3-3: NULL許容のidでの並び順を明示せよ
ORDER BY t.kind, sst.idはsst.idがNULLの場合の順序が実装依存となり紛らわしい。安定性のためNULLS LASTと副次キーを加えるがよい。-ORDER BY t.kind, sst.id +ORDER BY t.kind, sst.id NULLS LAST, sst.station_cd
93-94: 索引最適化の要請：複合索引を検討せよ朕、現状 station_station_types 表には単一列の索引（line_group_cd、station_cd、type_cd）と主キー索引（id）のみが見ゆる。もし当該クエリが
- line_group_cd で絞り込み、
- 続いて type_cd および id を参照／ソート
を行うのであれば、以下の合成索引を追加せよ。計画がより安定し、性能向上が見込まれる。• data/create_table.sql（約行番号 381–399）にて既存索引を確認せよ：
- idx_16421_station_station_types_line_group_cd ON (line_group_cd)
- idx_16421_station_station_types_station_cd ON (station_cd)
- idx_16421_station_station_types_type_cd ON (type_cd)
- 主キー索引 on id
該当クエリの WHERE 句／ORDER BY 句を再度確認し、以下のような合成索引の追加を検討せよ。
CREATE INDEX idx_station_station_types_lgc_tc_id ON public.station_station_types (line_group_cd, type_cd, id);※クエリ実装に応じ、列順や包含列は調整することを勧む。
.sqlx/query-58899fb950e311e87a33db5142b914a376a60c6cd2650c3723fbdde78beaff12.json (1)
3-3: 共通線区の抽出はINTERSECTで簡潔にせよ（任意）
common_linesはEXISTS二重化で記されておるが、INTERSECTで可読性を高められる。-common_lines AS ( - SELECT DISTINCT s1.line_cd - FROM stations s1 - WHERE s1.station_g_cd = $3 - AND s1.e_status = 0 - AND EXISTS ( - SELECT 1 - FROM stations s2 - WHERE s2.station_g_cd = $4 - AND s2.e_status = 0 - AND s2.line_cd = s1.line_cd - ) -), +common_lines AS ( + SELECT line_cd FROM stations WHERE station_g_cd = $3 AND e_status = 0 + INTERSECT + SELECT line_cd FROM stations WHERE station_g_cd = $4 AND e_status = 0 +),.sqlx/query-648214ea287859e20e4788c48dff2af34f7c31069f036e3a3cfa407f31a9fee5.json (1)
3-3: 秩序を与えよ（安定した並び順の明示）本問合せは並び順が無く、結果が非決定的となる恐れあり。既存クエリの慣例に従い
e_sort, station_cdで秩序を与えるがよい。- WHERE + WHERE s.station_g_cd = $1 AND s.line_cd = l.line_cd AND s.e_status = 0 - AND l.e_status = 0 + AND l.e_status = 0 + ORDER BY s.e_sort, s.station_cd.sqlx/query-6711dff69e3c8d999743db687be404ee34f4b081e2662661873c44b6e3be1c43.json (1)
3-3: NULL許容idでの整序を安定化せよ
ORDER BY sst.idはNULLの扱いが紛らわしい。後続の安定キーを加え、NULLS LASTを明示せよ。- ORDER BY sst.id + ORDER BY sst.id NULLS LAST, s.e_sort, s.station_cd.sqlx/query-b4769060ba658a2746a186f46d4ca4f0f690fe2fd7521ee8645193b364b6896a.json (1)
3-3: 冗長なる条件を削ぎ落とせCTE 内の
(sst_inner.type_cd = t_inner.type_cd)は既にLEFT JOIN types t_inner ON sst_inner.type_cd = t_inner.type_cdで満たしておる。可読性のため削除しても振る舞いは変わらぬ（左外部結合下での分岐設計が意図的でない限りな）。.sqlx/query-e19a25a597098f5d6c5f83992e6eb3a916d2256e346b93c1ad31cc26f9a705a2.json (2)
3-3: 不要な結合を斬り捨てよ本結果セットでは型情報列をすべて
NULL::...としており、LEFT JOIN types AS tは一切用いられておらぬ。無用の結合は外すがよい。速さは正義なり。- LEFT JOIN types AS t - ON t.type_cd = dst_sst.type_cd
308-367: .sqlx の nullability 整合を点検せよ
type_id / sst_id / type_cd / line_group_cd / passは本クエリでは NULL を返し得る。.sqlxのdescribe.nullableが真に一致しておるか、先の検証スクリプトで併せて洗い出すのだ。.sqlx/query-217b99932d995eff26a2eb16abab5dd05c27b6b77f78f169ca2049f45cf432ce.json (2)
3-3: pass 条件の意図を再確認せよ
sst_cte_c1 / c2はpass <> 1で line_group_cd を絞るが、最終sst_cteでは同条件を課しておらぬ。従って該当 line_group 内のpass = 1行も出力に混入し得る。これが汝の望む仕様か、確と再確認せよ。必要とあればsst_cteにも条件を加えるがよい。- sst_cte AS ( + sst_cte AS ( SELECT sst.id, sst.station_cd, sst.type_cd, sst.line_group_cd, sst.pass FROM station_station_types AS sst JOIN sst_cte_c1 ON sst.line_group_cd = sst_cte_c1.line_group_cd JOIN sst_cte_c2 ON sst.line_group_cd = sst_cte_c2.line_group_cd + WHERE sst.pass <> 1 )
303-362: sqlxのsst_idnullability を検分せよこのファイルでも
sst_idが非NULLとして記述されておれば、現行スキーマと食い違う。先に示した総点検スクリプトで状態を報告し、sqlx prepareの再実行で整合を取るがよい。
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📒 Files selected for processing (18)
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🧰 Additional context used
🧠 Learnings (4)
📓 Common learnings
Learnt from: TinyKitten
PR: TrainLCD/StationAPI#1305
File: stationapi/.sqlx/query-55bee6b45754d1da9bf555d319f015ce232f8574a41c3ef25b730d11071f8428.json:3-3
Timestamp: 2025-08-06T12:47:37.377Z
Learning: TinyKittenのStationAPIプロジェクトにおいて、SQLクエリの `pass <> 1` 条件は一部のクエリでは不要であり、PostgreSQL移行時にコードの最適化として意図的に除去された。この条件の有無についてはドメイン知識が必要で、機械的にチェックすべきではない。
Learnt from: TinyKitten
PR: TrainLCD/StationAPI#1305
File: data/create_table.sql:0-0
Timestamp: 2025-08-06T09:09:57.449Z
Learning: TinyKittenのStationAPIプロジェクトは機能的にCRUDのRead操作のみを行う読み取り専用システムであるため、PostgreSQLのUNLOGGEDテーブルを使用することでパフォーマンスを向上させている。データ損失時はCSVから再構築可能なため、UNLOGGEDテーブルの使用は適切な設計判断である。
Learnt from: TinyKitten
PR: TrainLCD/StationAPI#1305
File: data/create_table.sql:0-0
Timestamp: 2025-08-06T09:23:08.301Z
Learning: StationAPIプロジェクトにおいて、stations、lines、companiesテーブルは業務キー（station_cd, line_cd, company_cd）を主键として使用するため、IDENTITYによる自動採番は使用しない。一方、aliases、line_aliases、station_station_types、typesテーブルは代理キー（id）を使用し、自動採番される。
📚 Learning: 2025-08-06T09:23:08.301Z
Learnt from: TinyKitten
PR: TrainLCD/StationAPI#1305
File: data/create_table.sql:0-0
Timestamp: 2025-08-06T09:23:08.301Z
Learning: StationAPIプロジェクトにおいて、stations、lines、companiesテーブルは業務キー（station_cd, line_cd, company_cd）を主键として使用するため、IDENTITYによる自動採番は使用しない。一方、aliases、line_aliases、station_station_types、typesテーブルは代理キー（id）を使用し、自動採番される。
Applied to files:
data/create_table.sql
📚 Learning: 2025-08-06T09:09:57.449Z
Learnt from: TinyKitten
PR: TrainLCD/StationAPI#1305
File: data/create_table.sql:0-0
Timestamp: 2025-08-06T09:09:57.449Z
Learning: TinyKittenのStationAPIプロジェクトは機能的にCRUDのRead操作のみを行う読み取り専用システムであるため、PostgreSQLのUNLOGGEDテーブルを使用することでパフォーマンスを向上させている。データ損失時はCSVから再構築可能なため、UNLOGGEDテーブルの使用は適切な設計判断である。
Applied to files:
data/create_table.sql
📚 Learning: 2025-08-06T12:47:37.377Z
Learnt from: TinyKitten
PR: TrainLCD/StationAPI#1305
File: stationapi/.sqlx/query-55bee6b45754d1da9bf555d319f015ce232f8574a41c3ef25b730d11071f8428.json:3-3
Timestamp: 2025-08-06T12:47:37.377Z
Learning: TinyKittenのStationAPIプロジェクトにおいて、SQLクエリの `pass <> 1` 条件は一部のクエリでは不要であり、PostgreSQL移行時にコードの最適化として意図的に除去された。この条件の有無についてはドメイン知識が必要で、機械的にチェックすべきではない。
Applied to files:
.sqlx/query-7428cc69d3756a749121a1ad5eee1603aa5e7ee3fc30071a142f9a15502da031.json.sqlx/query-5f3a17f24bd4844e46b57d4920a3261ff87dfa6557926fb1b680d96c42ed56d4.json.sqlx/query-7a7492b76cb13f18b36cc3b488c0b3448c8ca29cbdb5e6f2390d2b22b886f81e.json.sqlx/query-8fd35acd42a42b730854a2f1b9ffa0fd2f8384b457e7945d4070d976ecd9594f.json.sqlx/query-3ec853ec90f7ed1b17658087c6b57da19ad084925a8cfc39d91297548ae25f8c.json.sqlx/query-6711dff69e3c8d999743db687be404ee34f4b081e2662661873c44b6e3be1c43.json.sqlx/query-0a1c6e15355fdf6363a083a43fec27a04b91b946ae7fdc192a721f9b6923e690.json.sqlx/query-587f17667fd03f8f3007ef9e754a168a2a09d30a408f98fdbd6f2b1fa4562a8c.json.sqlx/query-58899fb950e311e87a33db5142b914a376a60c6cd2650c3723fbdde78beaff12.json.sqlx/query-217b99932d995eff26a2eb16abab5dd05c27b6b77f78f169ca2049f45cf432ce.json.sqlx/query-648214ea287859e20e4788c48dff2af34f7c31069f036e3a3cfa407f31a9fee5.json.sqlx/query-55bee6b45754d1da9bf555d319f015ce232f8574a41c3ef25b730d11071f8428.json.sqlx/query-4c514298af7222e5c7085857d72370a5eab2f9ac56bb450e0d2303807abfb849.json.sqlx/query-e19a25a597098f5d6c5f83992e6eb3a916d2256e346b93c1ad31cc26f9a705a2.json
🔇 Additional comments (9)
.sqlx/query-85c490dd8992db5950dfd6c141b02048f361c5e9ac82cb7503fd8e75266cc06f.json (1)
1-190: よく整っておる。是とする主鍵検索＋e_status=0の絞り込み、average_distanceのCOALESCEも妥当である。
.sqlx/query-7a7492b76cb13f18b36cc3b488c0b3448c8ca29cbdb5e6f2390d2b22b886f81e.json (1)
1-190: この策、よし。駅群からの系統抽出として妥当である索引も活かせ、重複除去も意図通りである。
.sqlx/query-5f3a17f24bd4844e46b57d4920a3261ff87dfa6557926fb1b680d96c42ed56d4.json (2)
3-3: 【集計の意味、今一度ただせ】
此の計は COUNT(sst.line_group_cd) にて sst 行の総数を数えておる。同一駅で同一 type_cd が複数行存在すれば、その分だけ増える。汝の意図が「種別のユニーク数」であるなら、COUNT(DISTINCT sst.type_cd) が妥当ぞ。設計意図を確認し、然るべく改めよ。例:
- SELECT COUNT(sst.line_group_cd)::integer AS train_types_count + SELECT COUNT(DISTINCT sst.type_cd)::integer AS train_types_count
3-3: 【pass フィルタの整合性、検めよ】
他の新規クエリでは sst.pass <> 1 を用いて「通過」の除外を図っておるが、此処には無い。学習メモに曰く、当該条件は用途次第で意図的に外すことあり。今回は計上方針に合致しておるか、確認せよ。.sqlx/query-1ffa93b133de68b60a7e0a6663f212f613c175a35beb700a0001efb82f184d10.json (1)
152-161: 【LIMIT の器、統一せよ】
describe にて $6 は Int8（BIGINT）と記されておる。実装側（型/バインド）が 64bit に揃っているか、検めよ。32bit を用いる流儀なら Int4 に改めるのが筋である。.sqlx/query-8fd35acd42a42b730854a2f1b9ffa0fd2f8384b457e7945d4070d976ecd9594f.json (1)
3-3: 懸念無用：station_station_types.id は非NULL じゃ朕（われ）は知る、data/create_table.sql にて station_station_types.id は代理キーとして自動採番され、PRIMARY KEY＝NOT NULL と定義されておる。よって以下の懸念は誤りにして、ORDER BY sst.id のままで一切の問題なし。
・migration 定義（data/create_table.sql）
└ station_station_types.id は NOT NULL の PRIMARY KEY
・.sqlx describe メタデータでも nullable=false と記録済みよって「NULLS LAST」の追加も、「sst.id IS NOT NULL」での絞り込みも不要。元のクエリと実装をそのまま維持せよ。
Likely an incorrect or invalid review comment.
.sqlx/query-4c514298af7222e5c7085857d72370a5eab2f9ac56bb450e0d2303807abfb849.json (1)
3-3: LIMIT 1は妥当か、意図を確と示せ
LEFT JOIN station_station_typesにより1駅に複数行が生じうるのに、ORDER BY無しでLIMIT 1は行を恣意に選ぶのみ。要件として「任意の1件」で良いのか、あるいは決定的に1件を選ぶべきか、確認せよ。決定的に選ぶなら、次のいずれかを勧める。
- 種別優先度で安定選択（例）
- WHERE s.station_cd = $1 + WHERE s.station_cd = $1 AND s.e_status = 0 AND l.e_status = 0 - LIMIT 1 + ORDER BY sst.id NULLS LAST, t.kind, t.direction + LIMIT 1
- 1駅1行に正規化（DISTINCT ON）
-SELECT s.station_cd, ... , t.kind +SELECT DISTINCT ON (s.station_cd) + s.station_cd, ... , t.kind ... - WHERE s.station_cd = $1 + WHERE s.station_cd = $1 AND s.e_status = 0 AND l.e_status = 0 - LIMIT 1 + ORDER BY s.station_cd, sst.id NULLS LAST.sqlx/query-b4769060ba658a2746a186f46d4ca4f0f690fe2fd7521ee8645193b364b6896a.json (1)
3-3: ORDER BYに明示的なNULLS制御を加え、秩序を正すがよいstation_station_types.id を NULL 許容とした以上、
ORDER BY sst.idは NULL を含み得て並びが不定となる。NULLS LAST等で明示せよ。必要なら第二キーで安定化するがよい。- ORDER BY sst.id + ORDER BY sst.id NULLS LAST, t.priority DESC, s.station_cd⛔ Skipped due to learnings
Learnt from: TinyKitten PR: TrainLCD/StationAPI#1305 File: stationapi/.sqlx/query-55bee6b45754d1da9bf555d319f015ce232f8574a41c3ef25b730d11071f8428.json:3-3 Timestamp: 2025-08-06T12:47:37.377Z Learning: TinyKittenのStationAPIプロジェクトにおいて、SQLクエリの `pass <> 1` 条件は一部のクエリでは不要であり、PostgreSQL移行時にコードの最適化として意図的に除去された。この条件の有無についてはドメイン知識が必要で、機械的にチェックすべきではない。Learnt from: TinyKitten PR: TrainLCD/StationAPI#1305 File: data/create_table.sql:0-0 Timestamp: 2025-08-06T09:23:08.301Z Learning: StationAPIプロジェクトにおいて、stations、lines、companiesテーブルは業務キー（station_cd, line_cd, company_cd）を主键として使用するため、IDENTITYによる自動採番は使用しない。一方、aliases、line_aliases、station_station_types、typesテーブルは代理キー（id）を使用し、自動採番される。.sqlx/query-e19a25a597098f5d6c5f83992e6eb3a916d2256e346b93c1ad31cc26f9a705a2.json (1)
3-3: ORDER BYの秩序を定めよ（NULLS制御）将に命ず。NULL 許容の
sst.idを用いる以上、昇順における NULL の位置は明示せよ。混乱を断て。- ORDER BY s.station_g_cd, s.station_name + ORDER BY s.station_g_cd, s.station_name加えて、
dst_sst.idを並び替えに用いる場合はNULLS LASTを付与せよ（設計変更時の堅牢性向上のため）。⛔ Skipped due to learnings
Learnt from: TinyKitten PR: TrainLCD/StationAPI#1305 File: data/create_table.sql:0-0 Timestamp: 2025-08-06T09:23:08.301Z Learning: StationAPIプロジェクトにおいて、stations、lines、companiesテーブルは業務キー（station_cd, line_cd, company_cd）を主键として使用するため、IDENTITYによる自動採番は使用しない。一方、aliases、line_aliases、station_station_types、typesテーブルは代理キー（id）を使用し、自動採番される。Learnt from: TinyKitten PR: TrainLCD/StationAPI#1305 File: stationapi/.sqlx/query-55bee6b45754d1da9bf555d319f015ce232f8574a41c3ef25b730d11071f8428.json:3-3 Timestamp: 2025-08-06T12:47:37.377Z Learning: TinyKittenのStationAPIプロジェクトにおいて、SQLクエリの `pass <> 1` 条件は一部のクエリでは不要であり、PostgreSQL移行時にコードの最適化として意図的に除去された。この条件の有無についてはドメイン知識が必要で、機械的にチェックすべきではない。
| @@ -0,0 +1,190 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "SELECT l.line_cd,\n l.company_cd,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n l.e_status,\n l.e_sort,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n s.station_cd,\n s.station_g_cd,\n sst.line_group_cd,\n sst.type_cd,\n COALESCE(alias_data.line_name, l.line_name) AS line_name,\n COALESCE(alias_data.line_name_k, l.line_name_k) AS line_name_k,\n COALESCE(alias_data.line_name_h, l.line_name_h) AS line_name_h,\n COALESCE(alias_data.line_name_r, l.line_name_r) AS line_name_r,\n COALESCE(alias_data.line_name_zh, l.line_name_zh) AS line_name_zh,\n COALESCE(alias_data.line_name_ko, l.line_name_ko) AS line_name_ko,\n COALESCE(alias_data.line_color_c, l.line_color_c) AS line_color_c\n FROM lines AS l\n JOIN stations AS s ON s.station_cd = $1\n JOIN station_station_types AS sst ON sst.station_cd = s.station_cd AND sst.pass <> 1\n LEFT JOIN (\n SELECT DISTINCT ON (la.station_cd) \n la.station_cd,\n a.line_name,\n a.line_name_k,\n a.line_name_h,\n a.line_name_r,\n a.line_name_zh,\n a.line_name_ko,\n a.line_color_c\n FROM line_aliases AS la\n JOIN aliases AS a ON la.alias_cd = a.id\n WHERE la.station_cd = $1\n LIMIT 1\n ) AS alias_data ON alias_data.station_cd = s.station_cd\n WHERE l.line_cd = s.line_cd", | |||
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💡 Verification agent
❓ Verification inconclusive
【エイリアス選定、恣意に任すべからず】
alias_data の
- DISTINCT ON (la.station_cd)
- かつ LIMIT 1
- 且つ ORDER BY 不在
は、どのレコードが選ばれるか決定性を欠く。秩序を与えるがよい。乃ち ORDER BY を備えて優先度や新鮮度を示すか、DISTINCT ON を外し単純に ORDER BY ... LIMIT 1 とせよ。
例（方針の一例）:
- SELECT DISTINCT ON (la.station_cd)
+ SELECT DISTINCT ON (la.station_cd)
la.station_cd, ...
- FROM line_aliases AS la
+ FROM line_aliases AS la
JOIN aliases AS a ON la.alias_cd = a.id
- WHERE la.station_cd = $1
- LIMIT 1
+ WHERE la.station_cd = $1
+ ORDER BY la.station_cd, la.alias_cd DESC
+ LIMIT 1優先軸が別にあるなら、その列で ORDER せよ。
朕の宣旨：alias_data サブクエリに選択順序の明示を命ずる
alias_data の SELECT DISTINCT ON (la.station_cd) … LIMIT 1 は、ORDER BY が無いため選ばれるレコードが非決定的となる。必ず優先軸を示してソートせよ。
修正対象箇所：
- ファイル:
.sqlx/query-0a1c6e15355fdf6363a083a43fec27a04b91b946ae7fdc192a721f9b6923e690.json- alias_data サブクエリ内の
DISTINCT ON (la.station_cd)部分
命ずる修正例（一例に過ぎぬ、必要に応じて優先列を選定せよ）:
WHERE la.station_cd = $1
- LIMIT 1
+ ORDER BY la.station_cd, la.alias_cd DESC
+ LIMIT 1あるいは、DISTINCT ON を取り払い以下のように記述せよ:
SELECT la.station_cd, …
FROM line_aliases AS la
JOIN aliases AS a ON la.alias_cd = a.id
WHERE la.station_cd = $1
ORDER BY la.alias_cd DESC
LIMIT 1上記いずれかで、選択ロジックに秩序を与えよ。
🤖 Prompt for AI Agents
In
.sqlx/query-0a1c6e15355fdf6363a083a43fec27a04b91b946ae7fdc192a721f9b6923e690.json
at line 3, the alias_data subquery uses SELECT DISTINCT ON without an ORDER BY
clause, causing non-deterministic record selection. Fix this by adding an ORDER
BY clause to define a clear priority for selecting records, for example ordering
by la.alias_cd DESC, or alternatively remove DISTINCT ON and use ORDER BY with
LIMIT 1 to ensure deterministic selection.
🛠️ Refactor suggestion
【空文字の罠、封ぜよ】
COALESCE(alias_data.line_name, l.line_name) 等は、alias 側が空文字でも優先してしまう。587f… の流儀に倣い、NULLIF で空文字を無と見做す方がよい。
例:
- COALESCE(alias_data.line_name, l.line_name) AS line_name,
+ COALESCE(NULLIF(alias_data.line_name, ''), l.line_name) AS line_name,
...
- COALESCE(alias_data.line_color_c, l.line_color_c) AS line_color_c
+ COALESCE(NULLIF(alias_data.line_color_c, ''), l.line_color_c) AS line_color_c📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
Suggested change
| "query": "SELECT l.line_cd,\n l.company_cd,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n l.e_status,\n l.e_sort,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n s.station_cd,\n s.station_g_cd,\n sst.line_group_cd,\n sst.type_cd,\n COALESCE(alias_data.line_name, l.line_name) AS line_name,\n COALESCE(alias_data.line_name_k, l.line_name_k) AS line_name_k,\n COALESCE(alias_data.line_name_h, l.line_name_h) AS line_name_h,\n COALESCE(alias_data.line_name_r, l.line_name_r) AS line_name_r,\n COALESCE(alias_data.line_name_zh, l.line_name_zh) AS line_name_zh,\n COALESCE(alias_data.line_name_ko, l.line_name_ko) AS line_name_ko,\n COALESCE(alias_data.line_color_c, l.line_color_c) AS line_color_c\n FROM lines AS l\n JOIN stations AS s ON s.station_cd = $1\n JOIN station_station_types AS sst ON sst.station_cd = s.station_cd AND sst.pass <> 1\n LEFT JOIN (\n SELECT DISTINCT ON (la.station_cd) \n la.station_cd,\n a.line_name,\n a.line_name_k,\n a.line_name_h,\n a.line_name_r,\n a.line_name_zh,\n a.line_name_ko,\n a.line_color_c\n FROM line_aliases AS la\n JOIN aliases AS a ON la.alias_cd = a.id\n WHERE la.station_cd = $1\n LIMIT 1\n ) AS alias_data ON alias_data.station_cd = s.station_cd\n WHERE l.line_cd = s.line_cd", | |
| "query": "SELECT l.line_cd,\n l.company_cd,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n l.e_status,\n l.e_sort,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n s.station_cd,\n s.station_g_cd,\n sst.line_group_cd,\n sst.type_cd,\n COALESCE(NULLIF(alias_data.line_name, ''), l.line_name) AS line_name,\n COALESCE(alias_data.line_name_k, l.line_name_k) AS line_name_k,\n COALESCE(alias_data.line_name_h, l.line_name_h) AS line_name_h,\n COALESCE(alias_data.line_name_r, l.line_name_r) AS line_name_r,\n COALESCE(alias_data.line_name_zh, l.line_name_zh) AS line_name_zh,\n COALESCE(alias_data.line_name_ko, l.line_name_ko) AS line_name_ko,\n COALESCE(NULLIF(alias_data.line_color_c, ''), l.line_color_c) AS line_color_c\n FROM lines AS l\n JOIN stations AS s ON s.station_cd = $1\n JOIN station_station_types AS sst ON sst.station_cd = s.station_cd AND sst.pass <> 1\n LEFT JOIN (\n SELECT DISTINCT ON (la.station_cd) \n la.station_cd,\n a.line_name,\n a.line_name_k,\n a.line_name_h,\n a.line_name_r,\n a.line_name_zh,\n a.line_name_ko,\n a.line_color_c\n FROM line_aliases AS la\n JOIN aliases AS a ON la.alias_cd = a.id\n WHERE la.station_cd = $1\n LIMIT 1\n ) AS alias_data ON alias_data.station_cd = s.station_cd\n WHERE l.line_cd = s.line_cd", |
🤖 Prompt for AI Agents
In
.sqlx/query-0a1c6e15355fdf6363a083a43fec27a04b91b946ae7fdc192a721f9b6923e690.json
at line 3, the COALESCE expressions prioritize alias_data fields even when they
are empty strings, which should be treated as null. To fix this, wrap each
alias_data field in NULLIF(alias_data.field, '') inside the COALESCE to treat
empty strings as null and fall back to the original line fields correctly.
| @@ -0,0 +1,365 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "WITH\n from_cte AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM\n stations AS s\n WHERE\n s.station_g_cd = $1\n AND s.e_status = 0\n ),\n to_cte AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM\n stations AS s\n WHERE\n s.station_g_cd = $2\n AND s.e_status = 0\n ),\n sst_cte_c1 AS (\n SELECT\n sst.line_group_cd\n FROM\n station_station_types AS sst\n JOIN from_cte ON sst.station_cd = from_cte.station_cd\n WHERE\n sst.pass <> 1\n ),\n sst_cte_c2 AS (\n SELECT\n sst.line_group_cd\n FROM\n station_station_types AS sst\n JOIN to_cte ON sst.station_cd = to_cte.station_cd\n WHERE\n sst.pass <> 1\n ),\n sst_cte AS (\n SELECT\n sst.id,\n sst.station_cd,\n sst.type_cd,\n sst.line_group_cd,\n sst.pass\n FROM\n station_station_types AS sst\n JOIN sst_cte_c1 ON sst.line_group_cd = sst_cte_c1.line_group_cd\n JOIN sst_cte_c2 ON sst.line_group_cd = sst_cte_c2.line_group_cd\n )\n SELECT\n sta.station_cd,\n sta.station_g_cd,\n sta.station_name,\n sta.station_name_k,\n sta.station_name_r,\n sta.station_name_rn,\n sta.station_name_zh,\n sta.station_name_ko,\n sta.station_number1,\n sta.station_number2,\n sta.station_number3,\n sta.station_number4,\n sta.three_letter_code,\n sta.line_cd,\n sta.pref_cd,\n sta.post,\n sta.address,\n sta.lon,\n sta.lat,\n sta.open_ymd,\n sta.close_ymd,\n sta.e_status,\n sta.e_sort,\n lin.company_cd,\n COALESCE(NULLIF(COALESCE(a.line_name, lin.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, lin.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, lin.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, lin.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, lin.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, lin.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, lin.line_color_c), ''), NULL) AS line_color_c,\n lin.line_type,\n lin.line_symbol1,\n lin.line_symbol2,\n lin.line_symbol3,\n lin.line_symbol4,\n lin.line_symbol1_color,\n lin.line_symbol2_color,\n lin.line_symbol3_color,\n lin.line_symbol4_color,\n lin.line_symbol1_shape,\n lin.line_symbol2_shape,\n lin.line_symbol3_shape,\n lin.line_symbol4_shape,\n COALESCE(lin.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n tt.id AS type_id,\n sst.id AS sst_id,\n sst.type_cd,\n sst.line_group_cd,\n sst.pass,\n tt.type_name,\n tt.type_name_k,\n tt.type_name_r,\n tt.type_name_zh,\n tt.type_name_ko,\n tt.color,\n tt.direction,\n tt.kind\n FROM\n stations AS sta\n LEFT JOIN sst_cte AS sst ON sst.station_cd = sta.station_cd\n JOIN types AS tt ON tt.type_cd = sst.type_cd\n JOIN lines AS lin ON lin.line_cd = sta.line_cd AND lin.e_status = 0\n LEFT JOIN line_aliases AS la ON la.station_cd = sta.station_cd\n LEFT JOIN aliases AS a ON a.id = la.alias_cd\n WHERE\n sta.e_status = 0\n ORDER BY sst.id", | |||
Contributor
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🛠️ Refactor suggestion
ORDER BYにNULLS LASTを付せよ、乱れを鎮めよ
ORDER BY sst.id は sst.id が NULL の行を含み得る（列自体が NULL 許容となったため）。並び替えの規律を保つため、明示的に制御せよ。必要なら型優先度等で第二キーを添え、結果を安定化せよ。
- ORDER BY sst.id
+ ORDER BY sst.id NULLS LAST, tt.priority DESC, sta.station_cd📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
Suggested change
| "query": "WITH\n from_cte AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM\n stations AS s\n WHERE\n s.station_g_cd = $1\n AND s.e_status = 0\n ),\n to_cte AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM\n stations AS s\n WHERE\n s.station_g_cd = $2\n AND s.e_status = 0\n ),\n sst_cte_c1 AS (\n SELECT\n sst.line_group_cd\n FROM\n station_station_types AS sst\n JOIN from_cte ON sst.station_cd = from_cte.station_cd\n WHERE\n sst.pass <> 1\n ),\n sst_cte_c2 AS (\n SELECT\n sst.line_group_cd\n FROM\n station_station_types AS sst\n JOIN to_cte ON sst.station_cd = to_cte.station_cd\n WHERE\n sst.pass <> 1\n ),\n sst_cte AS (\n SELECT\n sst.id,\n sst.station_cd,\n sst.type_cd,\n sst.line_group_cd,\n sst.pass\n FROM\n station_station_types AS sst\n JOIN sst_cte_c1 ON sst.line_group_cd = sst_cte_c1.line_group_cd\n JOIN sst_cte_c2 ON sst.line_group_cd = sst_cte_c2.line_group_cd\n )\n SELECT\n sta.station_cd,\n sta.station_g_cd,\n sta.station_name,\n sta.station_name_k,\n sta.station_name_r,\n sta.station_name_rn,\n sta.station_name_zh,\n sta.station_name_ko,\n sta.station_number1,\n sta.station_number2,\n sta.station_number3,\n sta.station_number4,\n sta.three_letter_code,\n sta.line_cd,\n sta.pref_cd,\n sta.post,\n sta.address,\n sta.lon,\n sta.lat,\n sta.open_ymd,\n sta.close_ymd,\n sta.e_status,\n sta.e_sort,\n lin.company_cd,\n COALESCE(NULLIF(COALESCE(a.line_name, lin.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, lin.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, lin.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, lin.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, lin.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, lin.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, lin.line_color_c), ''), NULL) AS line_color_c,\n lin.line_type,\n lin.line_symbol1,\n lin.line_symbol2,\n lin.line_symbol3,\n lin.line_symbol4,\n lin.line_symbol1_color,\n lin.line_symbol2_color,\n lin.line_symbol3_color,\n lin.line_symbol4_color,\n lin.line_symbol1_shape,\n lin.line_symbol2_shape,\n lin.line_symbol3_shape,\n lin.line_symbol4_shape,\n COALESCE(lin.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n tt.id AS type_id,\n sst.id AS sst_id,\n sst.type_cd,\n sst.line_group_cd,\n sst.pass,\n tt.type_name,\n tt.type_name_k,\n tt.type_name_r,\n tt.type_name_zh,\n tt.type_name_ko,\n tt.color,\n tt.direction,\n tt.kind\n FROM\n stations AS sta\n LEFT JOIN sst_cte AS sst ON sst.station_cd = sta.station_cd\n JOIN types AS tt ON tt.type_cd = sst.type_cd\n JOIN lines AS lin ON lin.line_cd = sta.line_cd AND lin.e_status = 0\n LEFT JOIN line_aliases AS la ON la.station_cd = sta.station_cd\n LEFT JOIN aliases AS a ON a.id = la.alias_cd\n WHERE\n sta.e_status = 0\n ORDER BY sst.id", | |
| WHERE | |
| sta.e_status = 0 | |
| - ORDER BY sst.id | |
| + ORDER BY sst.id NULLS LAST, tt.priority DESC, sta.station_cd |
🤖 Prompt for AI Agents
In
.sqlx/query-217b99932d995eff26a2eb16abab5dd05c27b6b77f78f169ca2049f45cf432ce.json
at line 3, the ORDER BY clause uses sst.id which can be NULL, causing unstable
sorting. Fix this by appending NULLS LAST to the ORDER BY clause to explicitly
place NULL values at the end. If needed, add a secondary sort key to ensure
stable and deterministic ordering of the results.
| @@ -0,0 +1,190 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "SELECT \n l.line_cd,\n l.company_cd,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n l.e_status,\n l.e_sort,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n s.station_cd,\n s.station_g_cd,\n sst.line_group_cd,\n sst.type_cd,\n l.line_name,\n l.line_name_k,\n l.line_name_h,\n l.line_name_r,\n l.line_name_zh,\n l.line_name_ko,\n l.line_color_c\n FROM lines AS l\n JOIN station_station_types AS sst ON sst.line_group_cd = $1 AND sst.pass <> 1\n JOIN stations AS s ON s.station_cd = sst.station_cd\n AND s.e_status = 0\n AND l.line_cd = s.line_cd\n LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd\n LEFT JOIN aliases AS a ON la.alias_cd = a.id\n WHERE l.e_status = 0", | |||
Contributor
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🛠️ Refactor suggestion
不必要なLEFT JOINは刈り取れ。重複と負荷の温床である
line_aliases/aliasesをLEFT JOINしておるが、選択列で一切用いておらぬ。多重エイリアスがあれば行が増殖し、性能も落ちる。二策ある。
- 速やかに削除する（本クエリで不要ならば）
- LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd
- LEFT JOIN aliases AS a ON la.alias_cd = a.id- あるいは他クエリ同様に、エイリアス優先の名称・色へ置換する（用いるなら整合せよ）
COALESCE(NULLIF(a.line_name, ''), l.line_name) AS line_name,
COALESCE(NULLIF(a.line_color_c, ''), l.line_color_c) AS line_color_c,
-- など🤖 Prompt for AI Agents
In .sqlx/query-3ec853ec90f7ed1b17658087c6b57da19ad08492548ae25f8c.json at line
3, the LEFT JOINs to line_aliases and aliases tables are unnecessary since their
columns are not used in the SELECT clause, causing potential row duplication and
performance degradation. To fix this, either remove these LEFT JOINs entirely if
alias data is not needed, or modify the SELECT clause to use alias columns with
COALESCE and NULLIF functions to prioritize alias values over line table values,
ensuring consistency with other queries that handle aliases.
| @@ -0,0 +1,364 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "SELECT \n s.station_cd,\n s.station_g_cd,\n s.station_name,\n s.station_name_k,\n s.station_name_r,\n s.station_name_rn,\n s.station_name_zh,\n s.station_name_ko,\n s.station_number1,\n s.station_number2,\n s.station_number3,\n s.station_number4,\n s.three_letter_code,\n s.line_cd,\n s.pref_cd,\n s.post,\n s.address,\n s.lon,\n s.lat,\n s.open_ymd,\n s.close_ymd,\n s.e_status,\n s.e_sort,\n l.company_cd,\n COALESCE(NULLIF(COALESCE(a.line_name, l.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, l.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, l.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, l.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, l.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, l.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, l.line_color_c), ''), NULL) AS line_color_c,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n NULL::int AS type_id,\n NULL::int AS sst_id,\n NULL::int AS type_cd,\n NULL::int AS line_group_cd,\n NULL::int AS pass,\n NULL::text AS type_name,\n NULL::text AS type_name_k,\n NULL::text AS type_name_r,\n NULL::text AS type_name_zh,\n NULL::text AS type_name_ko,\n NULL::text AS color,\n NULL::int AS direction,\n NULL::int AS kind\n FROM stations AS s\n JOIN lines AS l ON l.line_cd = s.line_cd\n LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd\n LEFT JOIN aliases AS a ON a.id = la.alias_cd\n WHERE l.line_cd = $1\n AND s.e_status = 0\n AND l.e_status = 0\n ORDER BY s.e_sort, s.station_cd ASC", | |||
Contributor
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🛠️ Refactor suggestion
【行の氾濫、未然に防げ】
LEFT JOIN line_aliases/aliases は駅ごとに複数行を連ねる可能あり。今の選択列には DISTINCT も集約も無し、ゆえに駅行が膨張し得る。0a1c6e… と同様、サブクエリで「駅あたり一意の alias」を選抜してから JOIN するがよい。
例（方針の一例）:
- LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd
- LEFT JOIN aliases AS a ON a.id = la.alias_cd
+ LEFT JOIN LATERAL (
+ SELECT a.*
+ FROM line_aliases la
+ JOIN aliases a ON a.id = la.alias_cd
+ WHERE la.station_cd = s.station_cd
+ ORDER BY la.alias_cd DESC
+ LIMIT 1
+ ) AS a ON TRUEこれにて一駅一行の秩序が保たれる。
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
Suggested change
| "query": "SELECT \n s.station_cd,\n s.station_g_cd,\n s.station_name,\n s.station_name_k,\n s.station_name_r,\n s.station_name_rn,\n s.station_name_zh,\n s.station_name_ko,\n s.station_number1,\n s.station_number2,\n s.station_number3,\n s.station_number4,\n s.three_letter_code,\n s.line_cd,\n s.pref_cd,\n s.post,\n s.address,\n s.lon,\n s.lat,\n s.open_ymd,\n s.close_ymd,\n s.e_status,\n s.e_sort,\n l.company_cd,\n COALESCE(NULLIF(COALESCE(a.line_name, l.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, l.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, l.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, l.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, l.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, l.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, l.line_color_c), ''), NULL) AS line_color_c,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n NULL::int AS type_id,\n NULL::int AS sst_id,\n NULL::int AS type_cd,\n NULL::int AS line_group_cd,\n NULL::int AS pass,\n NULL::text AS type_name,\n NULL::text AS type_name_k,\n NULL::text AS type_name_r,\n NULL::text AS type_name_zh,\n NULL::text AS type_name_ko,\n NULL::text AS color,\n NULL::int AS direction,\n NULL::int AS kind\n FROM stations AS s\n JOIN lines AS l ON l.line_cd = s.line_cd\n LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd\n LEFT JOIN aliases AS a ON a.id = la.alias_cd\n WHERE l.line_cd = $1\n AND s.e_status = 0\n AND l.e_status = 0\n ORDER BY s.e_sort, s.station_cd ASC", | |
| "query": "SELECT \n\ | |
| s.station_cd,\n\ | |
| s.station_g_cd,\n\ | |
| … (other SELECT columns) …\n\ | |
| FROM stations AS s\n\ | |
| JOIN lines AS l ON l.line_cd = s.line_cd\n\ | |
| LEFT JOIN LATERAL (\n\ | |
| SELECT a.*\n\ | |
| FROM line_aliases la\n\ | |
| JOIN aliases a ON a.id = la.alias_cd\n\ | |
| WHERE la.station_cd = s.station_cd\n\ | |
| ORDER BY la.alias_cd DESC\n\ | |
| LIMIT 1\n\ | |
| ) AS a ON TRUE\n\ | |
| WHERE l.line_cd = $1\n\ | |
| AND s.e_status = 0\n\ | |
| AND l.e_status = 0\n\ | |
| ORDER BY s.e_sort, s.station_cd ASC", |
🤖 Prompt for AI Agents
In
.sqlx/query-587f17667fd03f8f3007ef9e754a168a2a09d30a408f98fdbd6f2b1fa4562a8c.json
at line 3, the LEFT JOINs to line_aliases and aliases can cause row
multiplication because multiple aliases per station may exist, and there is no
DISTINCT or aggregation to prevent this. To fix, refactor the query to first
select a unique alias per station in a subquery, then join that subquery to
stations, ensuring one row per station and preventing row expansion.
| @@ -0,0 +1,367 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "WITH\n from_cte AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM\n stations AS s\n WHERE\n s.station_g_cd = $1\n ),\n to_cte AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM\n stations AS s\n WHERE\n s.station_g_cd = $2\n ),\n common_lines AS (\n SELECT DISTINCT s1.line_cd\n FROM stations s1\n WHERE s1.station_g_cd = $3\n AND s1.e_status = 0\n AND EXISTS (\n SELECT 1\n FROM stations s2\n WHERE s2.station_g_cd = $4\n AND s2.e_status = 0\n AND s2.line_cd = s1.line_cd\n )\n ),\n sst_cte_c1 AS (\n SELECT\n sst.line_group_cd\n FROM\n station_station_types AS sst\n JOIN from_cte ON sst.station_cd = from_cte.station_cd\n WHERE\n sst.pass <> 1\n ),\n sst_cte_c2 AS (\n SELECT\n sst.line_group_cd\n FROM\n station_station_types AS sst\n JOIN to_cte ON sst.station_cd = to_cte.station_cd\n WHERE\n sst.pass <> 1\n ),\n sst_cte AS (\n SELECT\n sst.id,\n sst.station_cd,\n sst.type_cd,\n sst.line_group_cd,\n sst.pass\n FROM\n station_station_types AS sst\n JOIN sst_cte_c1 ON sst.line_group_cd = sst_cte_c1.line_group_cd\n JOIN sst_cte_c2 ON sst.line_group_cd = sst_cte_c2.line_group_cd\n )\n SELECT\n sta.station_cd,\n sta.station_g_cd,\n sta.station_name,\n sta.station_name_k,\n sta.station_name_r,\n sta.station_name_rn,\n sta.station_name_zh,\n sta.station_name_ko,\n sta.station_number1,\n sta.station_number2,\n sta.station_number3,\n sta.station_number4,\n sta.three_letter_code,\n sta.line_cd,\n sta.pref_cd,\n sta.post,\n sta.address,\n sta.lon,\n sta.lat,\n sta.open_ymd,\n sta.close_ymd,\n sta.e_status,\n sta.e_sort,\n lin.company_cd,\n COALESCE(NULLIF(COALESCE(a.line_name, lin.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, lin.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, lin.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, lin.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, lin.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, lin.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, lin.line_color_c), ''), NULL) AS line_color_c,\n lin.line_type,\n lin.line_symbol1,\n lin.line_symbol2,\n lin.line_symbol3,\n lin.line_symbol4,\n lin.line_symbol1_color,\n lin.line_symbol2_color,\n lin.line_symbol3_color,\n lin.line_symbol4_color,\n lin.line_symbol1_shape,\n lin.line_symbol2_shape,\n lin.line_symbol3_shape,\n lin.line_symbol4_shape,\n COALESCE(lin.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n NULL::int AS type_id,\n NULL::int AS sst_id,\n NULL::int AS type_cd,\n NULL::int AS line_group_cd,\n NULL::int AS pass,\n NULL::text AS type_name,\n NULL::text AS type_name_k,\n NULL::text AS type_name_r,\n NULL::text AS type_name_zh,\n NULL::text AS type_name_ko,\n NULL::text AS color,\n NULL::int AS direction,\n NULL::int AS kind\n FROM\n stations AS sta\n\t\t\t\tJOIN common_lines AS cl ON sta.line_cd = cl.line_cd\n\t\t\t\tJOIN lines AS lin ON lin.line_cd = cl.line_cd\n LEFT JOIN sst_cte AS sst ON sst.station_cd = sta.station_cd\n LEFT JOIN types AS tt ON tt.type_cd = sst.type_cd\n LEFT JOIN line_aliases AS la ON la.station_cd = sta.station_cd\n LEFT JOIN aliases AS a ON a.id = la.alias_cd\n WHERE\n sst.line_group_cd IS NULL\n AND lin.e_status = 0\n AND sta.e_status = 0\n ORDER BY sta.e_sort, sta.station_cd", | |||
Contributor
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🛠️ Refactor suggestion
不要なJOINを削ぎ落とせ（typesのLEFT JOIN）
本SELECTでは型関連カラムをすべて NULL リテラルで返しておるゆえ、LEFT JOIN types AS tt は決して参照されぬ。無用の結合は計画を重くするのみ、削除せよ。
- LEFT JOIN types AS tt ON tt.type_cd = sst.type_cd
LEFT JOIN line_aliases AS la ON la.station_cd = sta.station_cd
LEFT JOIN aliases AS a ON a.id = la.alias_cd🤖 Prompt for AI Agents
In
.sqlx/query-58899fb950e311e87a33db5142b914a376a60c6cd2650c3723fbdde78beaff12.json
at line 3, the LEFT JOIN to the types table (LEFT JOIN types AS tt ON tt.type_cd
= sst.type_cd) is unnecessary because all type-related columns are returned as
NULL literals and the join is never referenced. Remove this LEFT JOIN to
simplify the query and improve performance.
| @@ -0,0 +1,364 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "SELECT\n s.station_cd,\n s.station_g_cd,\n s.station_name,\n s.station_name_k,\n s.station_name_r,\n s.station_name_rn,\n s.station_name_zh,\n s.station_name_ko,\n s.station_number1,\n s.station_number2,\n s.station_number3,\n s.station_number4,\n s.three_letter_code,\n s.line_cd,\n s.pref_cd,\n s.post,\n s.address,\n s.lon,\n s.lat,\n s.open_ymd,\n s.close_ymd,\n s.e_status,\n s.e_sort,\n COALESCE(NULLIF(COALESCE(a.line_name, l.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, l.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, l.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, l.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, l.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, l.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, l.line_color_c), ''), NULL) AS line_color_c,\n l.company_cd,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n sst.id AS sst_id,\n sst.type_cd,\n sst.line_group_cd,\n sst.pass,\n t.id AS type_id,\n t.type_name,\n t.type_name_k,\n t.type_name_r,\n t.type_name_zh,\n t.type_name_ko,\n t.color,\n t.direction,\n t.kind\n FROM stations AS s\n JOIN lines AS l ON l.line_cd = s.line_cd AND l.e_status = 0\n LEFT JOIN station_station_types AS sst ON sst.line_group_cd = $1\n LEFT JOIN types AS t ON t.type_cd = sst.type_cd\n LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd\n LEFT JOIN aliases AS a ON a.id = la.alias_cd\n WHERE\n s.line_cd = l.line_cd\n AND s.station_cd = sst.station_cd\n AND s.e_status = 0\n ORDER BY sst.id", | |||
Contributor
There was a problem hiding this comment.
🛠️ Refactor suggestion
JOINの意図を明確にせよ（LEFT JOIN→INNER JOINへ）
LEFT JOIN sst ... の後に WHERE s.station_cd = sst.station_cd としており、実質INNER JOINである。条件はON句に集約し、冗長な WHERE s.line_cd = l.line_cd は刈り取るがよい。
- FROM stations AS s
- JOIN lines AS l ON l.line_cd = s.line_cd AND l.e_status = 0
- LEFT JOIN station_station_types AS sst ON sst.line_group_cd = $1
+ FROM stations AS s
+ JOIN lines AS l ON l.line_cd = s.line_cd AND l.e_status = 0
+ JOIN station_station_types AS sst
+ ON sst.line_group_cd = $1
+ AND s.station_cd = sst.station_cd
LEFT JOIN types AS t ON t.type_cd = sst.type_cd
LEFT JOIN line_aliases AS la ON la.station_cd = s.station_cd
LEFT JOIN aliases AS a ON a.id = la.alias_cd
WHERE
- s.line_cd = l.line_cd
- AND s.station_cd = sst.station_cd
AND s.e_status = 0
- ORDER BY sst.id
+ ORDER BY sst.idCommittable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In
.sqlx/query-6711dff69e3c8d999743db687be404ee34f4b081e2662661873c44b6e3be1c43.json
at line 3, the LEFT JOIN on station_station_types (sst) combined with a WHERE
clause filtering on s.station_cd = sst.station_cd effectively acts as an INNER
JOIN. Change the LEFT JOIN to an INNER JOIN and move the s.station_cd =
sst.station_cd condition into the ON clause of that join. Also, remove the
redundant WHERE condition s.line_cd = l.line_cd since it is already enforced by
the JOIN between stations and lines.
Comment on lines
+302
to
+361
| "nullable": [ | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| true, | ||
| null, | ||
| null, | ||
| null, | ||
| null, | ||
| null, | ||
| null, | ||
| null, | ||
| null, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| false, | ||
| true, | ||
| true, | ||
| false, | ||
| false, | ||
| true | ||
| ] |
Contributor
There was a problem hiding this comment.
💡 Verification agent
🧩 Analysis chain
sqlxメタ情報の整合を今すぐ検めよ
sst.id を NULL 許容に改めたなら、.sqlx の describe.nullable で sst_id が非NULLのままになっておらぬか確認せよ。齟齬あらば実行時に型検査で討たれるぞ。
以下の検証を走らせ、sst_id の nullability を総点検せよ。余が修正案の提示も引き受けよう。
🏁 Script executed:
#!/bin/bash
set -euo pipefail
python - << 'PY'
import json, sys, pathlib
root = pathlib.Path(".")
for p in root.rglob(".sqlx/query-*.json"):
try:
data = json.loads(p.read_text(encoding="utf-8"))
except Exception as e:
continue
cols = data.get("describe",{}).get("columns",[])
nulls = data.get("describe",{}).get("nullable",[])
if not cols or not nulls or len(cols)!=len(nulls):
continue
for i,c in enumerate(cols):
if c.get("name")=="sst_id":
print(f"{p}: sst_id nullable={nulls[i]}")
PYLength of output: 1792
朕命ず: sst_idのnullable設定を真（true）に改めよ
sst.idをNULL許容化したゆえ、describe.nullable 配列中のsst_idがfalseまたはnullのままでは、実行時の型検査で討たれる。ゆえに、下記各クエリメタ情報にて該当インデックスをtrueに変更せよ。
・対象ディレクトリ：
- プロジェクト直下の
.sqlx/ stationapi/.sqlx/
・修正すべきファイル（現在値）
- query-217b99932d995eff26a2eb16abab5dd05c27b6b77f78f169ca2049f45cf432ce.json（false）
- query-4c514298af7222e5c7085857d72370a5eab2f9ac56bb450e0d2303807abfb849.json（false）
- query-648214ea287859e20e4788c48dff2af34f7c31069f036e3a3cfa407f31a9fee5.json（false）
- query-6711dff69e3c8d999743db687be404ee34f4b081e2662661873c44b6e3be1c43.json（false）
- query-b4769060ba658a2746a186f46d4ca4f0f690fe2fd7521ee8645193b364b6896a.json（false）
- query-587f17667fd03f8f3007ef9e754a168a2a09d30a408f98fdbd6f2b1fa4562a8c.json（null）
- query-58899fb950e311e87a33db5142b914a376a60c6cd2650c3723fbdde78beaff12.json（null）
- query-e19a25a597098f5d6c5f83992e6eb3a916d2256e346b93c1ad31cc26f9a705a2.json（null）
修正後、再度検証スクリプトを走らせ、その結果を朕に示せ。
🤖 Prompt for AI Agents
In the file
.sqlx/query-b4769060ba658a2746a186f46d4ca4f0f690fe2fd7521ee8645193b364b6896a.json
between lines 302 and 361, the nullable setting for sst_id is currently false or
null, which conflicts with the updated schema allowing sst.id to be nullable.
Update the corresponding index in the describe.nullable array to true to reflect
that sst_id is now nullable. After making this change, run the validation script
again to confirm the fix.
| @@ -0,0 +1,370 @@ | |||
| { | |||
| "db_name": "PostgreSQL", | |||
| "query": "WITH from_stations AS (\n SELECT\n s.station_cd,\n s.line_cd\n FROM stations AS s\n WHERE s.station_g_cd = $1\n AND s.e_status = 0\n )\n SELECT\n s.station_cd,\n s.station_g_cd,\n s.station_name,\n s.station_name_k,\n s.station_name_r,\n s.station_name_rn,\n s.station_name_zh,\n s.station_name_ko,\n s.station_number1,\n s.station_number2,\n s.station_number3,\n s.station_number4,\n s.three_letter_code,\n s.line_cd,\n s.pref_cd,\n s.post,\n s.address,\n s.lon,\n s.lat,\n s.open_ymd,\n s.close_ymd,\n s.e_status,\n s.e_sort,\n l.company_cd,\n COALESCE(NULLIF(COALESCE(a.line_name, l.line_name), ''), NULL) AS line_name,\n COALESCE(NULLIF(COALESCE(a.line_name_k, l.line_name_k), ''), NULL) AS line_name_k,\n COALESCE(NULLIF(COALESCE(a.line_name_h, l.line_name_h), ''), NULL) AS line_name_h,\n COALESCE(NULLIF(COALESCE(a.line_name_r, l.line_name_r), ''), NULL) AS line_name_r,\n COALESCE(NULLIF(COALESCE(a.line_name_zh, l.line_name_zh), ''), NULL) AS line_name_zh,\n COALESCE(NULLIF(COALESCE(a.line_name_ko, l.line_name_ko), ''), NULL) AS line_name_ko,\n COALESCE(NULLIF(COALESCE(a.line_color_c, l.line_color_c), ''), NULL) AS line_color_c,\n l.line_type,\n l.line_symbol1,\n l.line_symbol2,\n l.line_symbol3,\n l.line_symbol4,\n l.line_symbol1_color,\n l.line_symbol2_color,\n l.line_symbol3_color,\n l.line_symbol4_color,\n l.line_symbol1_shape,\n l.line_symbol2_shape,\n l.line_symbol3_shape,\n l.line_symbol4_shape,\n COALESCE(l.average_distance, 0.0)::DOUBLE PRECISION AS average_distance,\n NULL::int AS type_id,\n NULL::int AS sst_id,\n NULL::int AS type_cd,\n NULL::int AS line_group_cd,\n NULL::int AS pass,\n NULL::text AS type_name,\n NULL::text AS type_name_k,\n NULL::text AS type_name_r,\n NULL::text AS type_name_zh,\n NULL::text AS type_name_ko,\n NULL::text AS color,\n NULL::int AS direction,\n NULL::int AS kind\n FROM stations AS s\n LEFT JOIN from_stations AS fs\n ON fs.station_cd IS NOT NULL\n LEFT JOIN station_station_types AS from_sst\n ON from_sst.station_cd = fs.station_cd\n LEFT JOIN station_station_types AS dst_sst\n ON dst_sst.station_cd = s.station_cd\n LEFT JOIN types AS t\n ON t.type_cd = dst_sst.type_cd\n LEFT JOIN line_aliases AS la\n ON la.station_cd = s.station_cd\n LEFT JOIN aliases AS a\n ON la.alias_cd = a.id\n JOIN lines AS l\n ON l.line_cd = s.line_cd\n AND l.e_status = 0\n WHERE\n (\n s.station_name LIKE $2\n OR s.station_name_rn LIKE $3\n OR s.station_name_k LIKE $4\n OR s.station_name_zh LIKE $5\n OR s.station_name_ko LIKE $6\n )\n AND s.e_status = 0\n AND (\n (\n from_sst.id IS NOT NULL\n AND dst_sst.id IS NOT NULL\n AND from_sst.line_group_cd = dst_sst.line_group_cd\n AND dst_sst.pass <> 1\n )\n OR\n (\n (from_sst.id IS NULL OR dst_sst.id IS NULL)\n AND s.line_cd = COALESCE(fs.line_cd, s.line_cd)\n )\n )\n ORDER BY s.station_g_cd, s.station_name\n LIMIT $7", | |||
Contributor
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🛠️ Refactor suggestion
from_stations の結合条件、混沌を招くなり。直ちに改めよ
LEFT JOIN from_stations AS fs ON fs.station_cd IS NOT NULL は実質的に全行との直積を生み、重複・性能劣化の温床となる。斯様なあやふやな結合は許されぬ。存在判定は EXISTS や CTE で線区群を特定し、厳正に合致を図るがよい。
まずは被害最小の手当として、直積を明示しつつ重複を抑えるがよい。
- LEFT JOIN from_stations AS fs
- ON fs.station_cd IS NOT NULL
+ -- 明示的なクロス結合（現状ロジック維持）。ただし重複抑制のため DISTINCT を併用せよ
+ CROSS JOIN from_stations AS fs
...
- SELECT
+ SELECT DISTINCT然れど、真に正すならば query-217b… に倣い、CTEで line_group を求めて合致させる設計に改めよ。余が雛形を示す。
WITH from_stations AS (...),
from_lg AS (
SELECT DISTINCT sst.line_group_cd
FROM station_station_types sst
JOIN from_stations fs ON fs.station_cd = sst.station_cd
WHERE sst.pass <> 1
),
dst_sst AS (
SELECT sst.*
FROM station_station_types sst
WHERE sst.pass <> 1
),
-- 以降: s と dst_sst を station_cd で結び、
-- EXISTS (SELECT 1 FROM from_lg flg WHERE flg.line_group_cd = dst_sst.line_group_cd)
-- もしくは fallback 条件で line_cd を用いる🤖 Prompt for AI Agents
In
.sqlx/query-e19a25a597098f5d6c5f83992e6eb3a916d2256e346b93c1ad31cc26f9a705a2.json
at line 3, the join condition "LEFT JOIN from_stations AS fs ON fs.station_cd IS
NOT NULL" causes a cross join leading to duplicates and performance issues. To
fix this, replace this ambiguous join with a proper join condition that matches
stations based on relevant keys, or use EXISTS or a CTE to strictly filter line
groups. As a minimal fix, explicitly join on station_cd or line_group_cd to
avoid cross join, and for a full fix, follow the suggested pattern by defining a
CTE for line_group and joining with station_station_types accordingly to ensure
correct and efficient filtering.
Merged
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5!station_station_types.csvのid列を指定せずとも連番idが入るようにした
Summary by CodeRabbit
新機能
データベース